Fonoa

What Fonoa does

Fonoa is the Tax Operating System for autonomous tax, leveraging AI to track every rule, act on every obligation, and prove every decision, built on modular infrastructure. Its platform connects the full indirect tax lifecycle, offering solutions for tax ID validation, real-time tax determination, e-invoicing, and returns. The system operates on a shared data model and integration, providing a single audit trail. Fonoa's AI agents monitor obligations, populate returns, catch anomalies, and assemble audit packs, enabling autonomous tax compliance across 120+ countries. The company aims to simplify global tax compliance for businesses, allowing them to scale and expand into new markets without being hindered by complex and fast-changing cross-border tax rules.

Products

• ValidateGlobal tax ID validation software that checks customer, supplier, and seller tax identities against live government registries in 120+ countries. It allows searching by company name, fuzzy matching, and provides registered business name, address, and tax metadata.
• Tax EngineCalculates the correct indirect tax treatment for every transaction in real time across 190+ jurisdictions (including VAT, GST, Sales Tax). It features an API-first design, configurable rules, and automatic updates for global tax legislation.
• E-InvoicingA unified e-invoicing API that handles local specifics, provides certified connections, error standardization, and ensures audit-readiness across 150+ countries. It supports both AR and AP e-invoicing and integrates with other Fonoa modules.
• ReturnsAutomates indirect tax return filing by generating, validating, and submitting returns directly from transaction data. It includes built-in checks, direct submission to tax authority portals, and syncs with e-invoicing data.
• KnowledgeA global tax intelligence layer that provides answers to complex tax questions with cited sources and monitors and updates tax rules using AI and human checks.
• AuditProvides access to and allows querying of tax data for audit readiness, reducing preparation time from weeks to minutes.
• AgentsAI-driven end-to-end tax compliance automation where AI agents execute the full compliance lifecycle under human supervision and approval (coming soon).
• LookupA product to validate tax IDs of suppliers and business customers to determine whether to charge sales tax, VAT, or GST.
• ReportingAutomatically reports sales transactions to tax authorities in real-time whenever and wherever required.
• Data sharingSeamlessly exchanges tax data across systems.

Key capabilities

• AI-powered tax intelligence
• Modular infrastructure
• Full indirect tax lifecycle coverage (validation, determination, e-invoicing, returns)
• Shared data model and integration
• Single audit trail
• Global coverage across 120+ countries for validation and 190+ for tax determination
• Real-time processing (sub-200ms for tax determination)
• API-first design
• Configurable without engineering escalation
• Accredited government connections for e-invoicing
• Automated return filing with full lineage
• Living global tax intelligence layer
• Audit readiness tools
• AI agents for end-to-end compliance automation (coming soon)
• Real-time tax ID validation against live government registries
• Search by name for tax IDs
• Batch validation of up to 50,000 records
• Automatic updates for global tax legislation
• Custom rules, overrides, and logic adjustments
• Built-in threshold monitoring
• Full transparency with breakdown of tax calculations
• Unified e-invoicing solution across mandates
• Full visibility across every e-invoicing submission
• One input handles every local e-invoicing format
• AR and AP e-invoicing support
• Built-in data validations for returns
• Direct submission to tax authority portals for returns
• Clear collaboration tools for tax teams
• User credentials hashed for privacy
• Data encryption using TLS
• Regular vulnerability assessments and penetration testing
• GDPR compliant

Use cases

• Autonomous tax operations
• Global indirect tax compliance
• Tax ID validation for customers, suppliers, and sellers
• Real-time tax determination for transactions (VAT, GST, Sales Tax)
• E-invoicing compliance across multiple countries
• Automated tax return filing
• Monitoring and adapting to global tax legislation changes
• Audit preparation and data access
• Onboarding new customers and suppliers with tax ID verification
• Ensuring VAT-registered status of suppliers before payment
• Meeting e-invoicing mandates
• Keeping master tax data current and accurate
• Launching into new markets with local tax logic
• Handling complex transaction flows (marketplace, subscription, cross-border)
• Maintaining consistent tax logic across AP/AR
• Preventing invoice rejections and payment delays
• Replacing manual tax filing processes
• Bringing tax returns in-house
• Filing for digital services (One Stop Shop returns)
• Syncing real-time reporting and periodic filings
• Reducing customer support tickets related to tax ID validation
• Saving time on manual tax work and regulatory changes

AI approach

Fonoa uses AI to track tax rules, act on obligations, and prove decisions, built on modular infrastructure. It applies AI to automate tax ID validation, real-time tax determination, e-invoicing, and returns. AI agents are being developed for end-to-end tax compliance automation, with humans supervising. The platform also uses AI and human checks to monitor and update tax rules globally, applying changes to workflows automatically and delivering tailored tax updates.

Tech named: AI agents

Industries served

• Software Development
• Digital Economy Businesses
• Marketplaces
• Logistics
• Hospitality
• Communications
• Cloud Providers

What it says sets it apart

• AI that tracks every rule, acts on every obligation, and proves every decision
• Modular infrastructure covering the full indirect tax lifecycle
• One shared data model and integration with one audit trail
• Operates across 120+ countries with rapid client go-live times
• High customer retention (100%)
• High ease of doing business (97%) and quality of support (94%) according to G2 reviewers
• API-first approach for seamless integration and scalability
• Ability to search for tax IDs by name with fuzzy matching
• Real-time validation against live government registries
• Sub-200ms tax determination speed
• Configurable tax engine without engineering escalation
• Unified e-invoicing solution for over 150 countries
• Accredited government connections for e-invoicing with ultra-low rejection rates
• Automated return filing with built-in checks and direct submission
• Living global tax intelligence layer with cited sources
• Audit readiness from weeks to minutes
• Born out of first-hand experience at Uber with scaling tax operations
• Acquisition of Indirect Tax Edge from PwC and significant funding ($110M)
• GDPR compliant with robust security practices

Funding rounds we track

From the AI funding tracker — rounds as reported by the linked publications.